In a box, 35% of the buttons are silver, 20% are blue and the rest are white
- What fraction of the buttons is white? Give your answer in the simplest form.
- There are 639 white buttons in the box. How many buttons are there in the box altogether?
(a)
Percentage of buttons that are white
= 100% - 35% - 20%
= 45%
Fraction of buttons that are white
=
45100 =
920 (b)
Number of white buttons = 9 u
9 u = 639
1 u = 639 ÷ 9 = 71
Total number of buttons
= 20 u
= 20 x 71
= 1420
Answer(s): (a)
920; (b) 1420